What's up with DAV:comment?

If i understand http://www.ietf.org/rfc/rfc3253.txt, than DAV:comment could be used to set a comment to a resource.

For the current project i am working on, i need the possibility to add a comment to a resource which should be PUT
to the server.

The problem is that i couldn't find any implementation for DAV:comment on both sides, server and client.
Is this solved different for slide or is there no requirement for this property?

Regards,
Matthias Wolf

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